EP 3940370 A1 20220119 - METHOD FOR EXTRACTING SPECTRAL INFORMATION OF OBJECT TO BE DETECTED
Title (en)
METHOD FOR EXTRACTING SPECTRAL INFORMATION OF OBJECT TO BE DETECTED
Title (de)
VERFAHREN ZUR EXTRAKTION VON SPEKTRALINFORMATIONEN EINES ZU ERFASSENDEN OBJEKTS
Title (fr)
PROCÉDÉ D'EXTRACTION D'INFORMATIONS SPECTRALES D'OBJET À DÉTECTER
Publication
Application
Priority
CN 2020081962 W 20200330
Abstract (en)
The present application discloses a method for extracting spectral information of a substance under test: identifying a pixel region A(x, y) occupied by an object under test from a hyperspectral image acquired; extracting a specular reflection region A<sub>q</sub> and a diffuse reflection region A<sub>r</sub> from the pixel region A(x, y), and calculating a representative spectrum I<sub>q</sub>(ω) of the specular reflection region A<sub>q</sub> and a representative spectrum I<sub>r</sub>(ω) of the diffuse reflection region A<sub>r</sub>, respectively; by comparing each element in the representative spectrum I<sub>q</sub>(ω) of the specular reflection region A<sub>q</sub> with each element in the representative spectrum I<sub>r</sub>(ω) of the diffuse reflection region A<sub>r</sub>, separating information of a light source from spectral information of the substance to obtain a first spectral invariant C(ω). This method does not require additional spectral information of the light source, which improves the analysis efficiency. Since there is no need to collect reference spectra, the hardware of a related product is simpler and more compact. Moreover, it avoids errors resulting from many aspects such as changes in the spectrum of the light source, the baseline drift of the acquisition device, etc., increasing the accuracy of analysis.
IPC 8 full level
G01N 21/55 (2014.01)
CPC (source: CN EP KR US)
G01B 11/00 (2013.01 - CN); G01J 3/2803 (2013.01 - US); G01J 3/2823 (2013.01 - KR); G01J 3/42 (2013.01 - KR); G01N 21/25 (2013.01 - US); G01N 21/255 (2013.01 - KR); G01N 21/27 (2013.01 - US); G01N 21/31 (2013.01 - CN EP KR US); G01N 21/55 (2013.01 - EP KR US); G06N 3/08 (2013.01 - KR); G06T 7/90 (2017.01 - US); G06V 10/143 (2022.01 - US); G06V 10/25 (2022.01 - US); G06V 10/58 (2022.01 - US); H04N 5/30 (2013.01 - US); H04N 23/10 (2023.01 - US); G01J 2003/2826 (2013.01 - US); G01N 2021/1765 (2013.01 - EP KR); G01N 2021/555 (2013.01 - EP); G01N 2021/556 (2013.01 - US); G01N 2021/557 (2013.01 - US); G01N 2201/129 (2013.01 - EP); G01N 2201/1296 (2013.01 - KR)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3940370 A1 20220119; EP 3940370 A4 20221130; CN 113272639 A 20210817; CN 113272639 B 20231027; JP 2022539281 A 20220908; KR 20220066168 A 20220523; US 2022207856 A1 20220630; WO 2021195817 A1 20211007
DOCDB simple family (application)
EP 20928567 A 20200330; CN 2020081962 W 20200330; CN 202080007936 A 20200330; JP 2021553116 A 20200330; KR 20227014109 A 20200330; US 202017603318 A 20200330